Reactive dyes containing methylolamide triazine groups



United States Patent Office 3,072,454 REACTIVE DYES CONTAINING METHYLOL- AMIDE TRIAZINE GROUPS Robert S. Long, Bound Brook, and Harold T. Lacey, Westfield, N.J., and Raymond E. Kourtz, Pensacola, Fla., assignors to American Cyauamid Company, New York, N. Y., a corporation of Maine No Drawing. Filed July 7, 1960, Ser. No. 41,250

Claims. (Cl. 854.2)

This invention relates to fibers modified by condensation with color-modified triazines containing methylolamido radicals. More specifically, it relates to cellulose fibers modified by condensation with compounds of the formula A- INF,

in which at least one of A and B is the residue of a dye molecule substituted by at least one ionogenic substituent, and also by an amino group through which it is linked to the triazine ring, n is a positive integer which is one when E is the same as A, at least one of B and C is an amino group having at least one substituent, the said substituent being hydroxymethyl when it is not lower alkoxymethyl, B having no definition difierent from A and C. These dyes can be described also as 1,3,5-triazines having at least one and not more than two substituents A and at least one and not more than two substituents C, there being no substituents on the triazine ring other than A and C, A being the residue of an amino dyestuif having a replaceable hydrogen on the said amino substituent, the bonds between said dyestuff residue and the triaziue rings being in place of said replaceable hydrogens, and C is an -NH group, at least one hydrogen of all of those on said triazine amino groups being replaced by either methylol or alkoxymethyl. The latter groups are those which react to form the modified cellulose of our invention by forming a CH O link through the hydroxyls of the cellulose.

We have found that cellulose fibers modified by reaction with dyes of the above type are superior colored fibers showing advantageous properties in a number of respects in comparison with fibers merely dyed with related compounds having no chemically reactive bonding groups. For example, they have very high wash fastness and very high crock fastness. The reaction with these dyes is a simple application method. This modification of fibers is especially useful in combination with resin finishes for textiles, such as the melamine resins, e.g., trimethylol melamine, trismethoxymethyl melamine, or the urea resins, e.g., dimethylolurea, or dimethylol ethylene urea, and the like. The fibers can be any of various types of cellulosic fibers such as cotton, rayon, acetate rayon, and the like or blends thereof. They can also be any synthetic fiber which has reactive alcoholic hydroxyl groups or free amino groups.

The dyes used in our invention, as can be seen by the above formula, are based on the triazine nucleus. At least one and at most two of the carbons of the triazine are linked through an amino group to a dye molecule. This amino group may be either a primary or a secondary amino group in the original dye molecule. It cannot be a tertiary amino group in the original dye molecule since there would then be no replaceable hydrogen by whose elimination there can be formed a further covalent bond with the triazine nucleus. The dye residues which may be thus linked to the triazine nucleus in the dyestuffs of our invention will be described below 3,072,454 Patented Jan. 8, 1963 in much detail. In that discussion, extensive reference will be made to the Chemistry of Synthetic Dyes by K. Venkataraman, Academic Press, N.Y. (1952), and to the American Chemical Society Monograph, No. 127, on The Chemistry of Synthetic Dyes and Pigments, by H. H. Lubs, Reinhold, N.Y. (1955). While many of the dyestuffs residues which may be used in the dyes of our invention will be described in detail in the specification, in order to provide a complete disclosure, these treatises are included expressly by reference in this specification, as indicated in the various discussions.

In preparing the dyes used in our invention, the usual method of preparation involves the condensation of a monoaminodichlorotriazine or a diaminomonochlorotriazine with an amino dyestuif. Consequently, one of the important limitations on the dyestuff residues which may be in the dyes of our invention is that these dyestuffs must contain an amino group capable of forming a further covalent linkage, i.e., an amino group having a replaceable hydrogen. Such a definition includes primary and secondary amino groups and excludes tertiary amino groups. In general, the secondary amines preferably are alkylaminoaryl compounds since the diarylamines do not react as well. As described below, all the various classes of dyestufls can be used, but those members which are usable have this one factor in common: no matter what the general class of dyestuif involved, the dyestuff must have a primary or secondary amino group which can react with the chlorotriazine to form the dyestuffs of our invention. In general, the dyestuffs of simpler structure are preferred.

The second limitation on the dyestuffs of our invention is that the dyestuff residue which forms part of the structure of the dyestuffs of our invention must contain an ionogenic group. Such ionogenic groups are necessary in order to achieve the proper water solubility for the application of the dyestuifs to the fiber. They include the more common acid radicals such as sulfonic acid, sulfonarnide and carboxylic acids and also the less well known but equally usable phosphonic acid and phosphonamide radicals, as well as the more esoteric (and far less likely to be encountered) acidic substituents for organic molecules such as the arsinic acid, sulfenic acid, sulfinic acid, stibnic acid, and similar acid substituents. They also include the basic ionogenic groups such as quaternary ammonium groups. The dye residues should contain at least one and preferably two or more such solubilizing groups. Of these ionogenic groups the sulfonic acid group is by far the preferred one, with the carboxylic acid and the sulfonamide groups the next most likely to be used. Although the sodium salts of these acids are usually used, it is to be understood that any other soluble salt, such as lithium, potassium, rubidium, cesium and ammonium and quaternary ammonium salts are equally usable to get water solubility, as well as tertiary and higher chain quaternary ammonium salts, such as e.g., the diphenylguanidine and di-o-tolylguanidine salts to get solubility in other solvents.

THE DYESTUFF RESIDUES-A20 DYES Azo dyes are described in Venkataraman in chapters 11-22, inclusive, pages 409-704. A great many azo dyestuffs are known to the art which have primary or secondary amino groups in their structure, and which carry acidic substitutents as described above. Such compounds, as described in the above-mentioned pages of Venkataraman, are expressly included by reference as The azo dyes represent probably the largest class of dyestuffs and the class giving the greatest flexibility in structure and color. There can be used in the dyestuffs of our invention all the variations of azo dyes known, such as the monoazo dyes, the disazo, the trisazo, the tetrakisazo, the mordant dyes, the stilbene dyes, the pyrazolone and thiazole dyes, and the like, so long as the restrictions aremet of a primary or a secondary amino group through which they can be attached to the triazine ring and of the presence of acidic substituents.

To illustrate the type of dye used in our invention a simple example is as follows, wherein an azo dye derived from 2-amino-5-chloro-4-toluenesulfonic acid coupled to H-acid (8-amino-1-naphthol-3,6-disulfonic acid) is linked through the amino group to a bis-methylolamido triazine residue:

Such a dyestufi is prepared by reacting 2-chloro-4,6diaminotriazine with the aminoazo dye, followed by treatment of the resulting diaminotriazine derivative with formaldehyde to form-the methylolamido triazine compound. The methylolation reaction will be described in more detail at a later place in this specification.

The azo dye itself may be used for the reaction with the aminochlorotriazine derivative. However, in the case of; azo; dyes especially, there are alternative methods whereby the chlorotriazine may be first reacted with an aromatic compound, to be used as a coupling component, or as a diazo component forming the azo molecule. In the reaction, for example, of an aminonaphthol with an aminochlorot'riazine followed by coupling of a dia'zo component into the naphthol, there is obtained the same dyestuff which would be obtained by first coupling into the free aminonaphthol and then condensing the azo dyestuif withthe aminochlorotriazine. Similarly, the aminochlorotriazine may be reacted with one amino group in an aromatic diamine and the other amino group can be diazotized and coupled to form the azo derivative. These synthetic methods, can be illustrated by the following equations. In the first, chlorotoluidine sulfonic acid is diazotized. and-coupled with H-acid to form the azo dye and this is then condensed with 2-chloro-4,6-diamino triazine to give the diaminotriazinylamino azo dye which in turn is condensed with formaldehyde to give the dye used in our invention:

Alternatively, the same dyestutf can be prepared by reacting H-acid with 2-chloro-4,6-diaminotriazine and coupling the reaction produce with chlorotoluidine sulfonic acid (CTS) diazo, followed by treating the final product, as before, with formaldehyde:

Obviously, if there are further amino groups in the completed dye molecule, or if the dye molecule is capable of further coupling disazo, trisazo and tetrakisazo dyestuffs can be readily prepared, either before or after the diaminotriazinyl radical is placed upon an amino group in the dyestufl residue. Also, more than one such diaminotriazinylamino residue can be placed upon a dyestulf radical (for example by coupling an aminoazo dye having a diaminotriazinylamino substituent into an azo component having an open coupling position and also having a diaminotriazinylamino substituent). Likewise, by starting from a 2-amino-4,6-dichlo1otriazine more than one azo dyestuff residue can be placed upon the triazine radical. In such case there is left on the triazine radical only one amino to be hydroxymethylated.

An alternative preparation of the dyes used in our invention starts from the amino dyestuif and 2-chloro-4,6- bis(methoxymethylamino)triazine. The latter is prepared by methylolation and alkylation of the chlorodiaminotriazine before reaction with the amino dyestuff, instead of afterwards.

The preparation of the azo dyes may be carried out under conventional conditions, whether the azo dye is prepared first and then reacted with the chlorotriazine to form the dyes of our invention, or whether the chlorotriazine is reacted with either the diazo component or the coupling component and the azo dye is then subsequently synthesized. The reaction of the azo dye or its fragments with the chlorodiaminotriazine or dichlorornonoaminotriazine may be carried out under various conditions. For example, either aqueous or non-aqueous conditions can be used. The reaction under aqueous conditions is carried out in the presence of an acid binding agent, such as sodium carbonate or potassium carbonate to take up the hydrogen chloride evolved. In a non-aqueous system an reacted with formaldehyde to form the methylolarnido derivative.

The azo dye residues of the new triazine dyes which form our invention are derived from various diazo components and coupling components. Examples of the amines which may be used for the diazo components are:

Aniline o-Nitroaniline m-Nitroaniline p-Ni-troaniline o, m, and p-Chloroaniline 2-nitro-4-chloroaniline Z-amino-S-nitrotoluene 4-amino-3-nitrotoluene 2-amino-4-nitrotoluene Z-amino-S-chlorotoluene 2-amino-4-chlorotoluene Z-amino-6-chloroto1uene 2,5-dichloroaniline 3,4-dichloroaniline 3-arnino-4-chlorotoluene o-Anisidine 3-nitro-4-methoxyaniline 4-nitro-2-methoxyaniline 2-nitro-4-ethoxyaniline Dianisidine l-amino-2,5-ethoxy-4-benzoylaminobenzene 4-amino-1-benzoylamino-3,6-dimethoxybenzene Benzidine(including monoacyl derivatives) Tolidine 4-chloro-2-rnethoxyaniline 1,S-dimethoxy-Z-amino-4-chlorobenzene 1 nethoxy-Z-benzoylamino-4-chloro-5-amino-benzene l-naphthylamine l-aminoanthraquinone l-amino-3-chloroanthraquinone 4-diethylsulfamido-2-amino-l-methoxybenzene l-methoxy-Z-aminobenzene-4-ethylsulfone 6-benzoylamino-4-amino-3-methyltoluene 4-methoxy-4-aminodiphenylamine 4-aminodiphenylamine 4-chloro-2-aminodiphenyl ether 4,4-dichloro-Z-aminodiphenyl ether o-Aminodiphenylamine 2,6,4'-trimethyl-3'-nitro-4-aminoazobenzene 5-methyl-4-methoxy-2-amino 2' chloro 4 nitroazobenzene 4-aminodiphenylamino-4-azotoluene Z-phenylazo-l-naphthylamine 2-aminodiphenylether-4-sulfonic acid 2-amino-2'-methyldiphenylether-4-sulfonic acid 4-aminoazobenzene 4-aminoazobenzene-4-sulfonic acid 4-aminoazobenzene -3,4'-disulfonic acid Orthanilic acid 1-methyl-4-aminobenzene3-sulfonic acid 2-amino5-chloro-4-toluenesulfonic acid 4-chloroaniline-2-sulfonic acid \Aniline -2,5-disulfonic acid 4-chloro-5- nethyl-2-aniline sulfonic acid 3-amino-1-methoxybenzene-4-su1fonic acid 2,4-dimethylaniline-6-sulfonic acid 3-amino-1:trifluoromethylbenzene-4-sulfonic acid 3,4-dichloroaniline-G-sulfonic acid 3,5 -dichloroaniline-6-sulfonic acid 3-methoxyaniline-6-sulfonic acid 4-methylaniline-6-sulfonic acid Dehydrothiotoluidine sulfonic acid 2aminonaphthalene-4,S-disulfonic acid 2-aminonaphthalene-6-sulfonic acid 2-aminonaphthalene-6,8-disulfonic acid l-aminonaphthalene-4,5 ,6 and 8-sulfonic acid 2-aminon-aphthalene-S ,7-disulfonic acid 2-aminonaphthalene-7-sulfonic acid 7 p-Phenylenediamine 3 ,3 -dichlorobenzidine 3,3'-benzidine disulfonic acid 2,2-dichloro-3 ,3 -dimethoxy-4,4'-diaminodiphenyl 3-aminopyridine d-aminoquinoline Examples of the compounds which may be used as the coupling components are:

Aniline oToluidine m-Toluidine 2,5-dimethylaniline o-Anisidine maAnisidine 3-amino-4-methoxytoluene 2,5-dimethoxyaniline N-methylaniline N-methyl-o-toluidine N-methyl-m-toluidine N-ethyl-o-toluidine N-methyl-Z-methoxy-S-methylaniline N-ethyl-Z-methoxy-S-methylaniline N-methyl-m-anisidine N-ethyl-m-anisidine 1-a1nino-8-naphthol-6-sulfonic acid 1-amino-8-naphthol-3,6-disulfonic acid 1-amino-8-naphthol-4,6-disulfonic acid 1-methylamino-8-naphthol-6-sulfonic acid Z-amino-S-naphthol-7-sulfonic acid 2-methylamino-5-naphthol-7-sulfonic acid 1-amino-8-naphthol-2,4-disulfonic acid l-amino-8-naphthol-4-sulfonic acid 1-amino-8-naphthol-6-sulfonic acid 3-methyl-5-pyrazolone 1-phenyl-3-methyl-5-pyrazolone 1- 4-sulfophenyl -3-methyl-5-pyrazolone 1- (4-chlorophenyl -3-methyl-5-pyrazolone 1-phenyl-3-carbethoxy-5-pyrazo1one Acetoacetanilide 4-sulfo-acetoacetanilide Bis-acetoacetbenzidide Bis-acetoacettolidide Acetoacettolidide Beta-hydroxynaphthoic acid arylides of various naphthoic acids such as 3-hydroxy-2naphthanilide 3-hydroxy-Z-naphthoyltoluidide and the like.

Many other coupling components and diazo components are described in the various chapters of Venkatara' man covering the azo dyes, found on pages 409-704 of that treatise. Any combination of these components which produces an azo dye having 1) an amino group capable of reacting with the chlorotriazine derivative (i.e., a primary or secondary amino group) and (2) which also has an ionogenic substituent, is capable of forming the dyestuffs of our invention which contains azo dye residues. A great many such dyes are specifically disclosed in these chapters.- As stated above, the amino group may be either a primary or a secondary, but not a tertiary amino group. There must be one hydrogen capable of replacement by the chlorotriazine.

VAT DYE RESIDUES The various anthraquinone and other polyquinoid structures which are known collectively under the generic term of vat dyes, are'described in Venkatararnan in chapters 27-34, inclusive, pages 803-1058. By the very nature of vat dyes, most of them lack the acidic group which is a necessity in the application of the dyestufis of our invention. However, forms of them With free sulfonic or carboxylic acid substituents are known in the literature and in commerce in various uses. Also, vat

dyes having amino groups which can be quaternized as well as amino groups for linking to the triazine are available in the literature. To the extent that anthraquinones and other vat dye structures are available having primary or secondary amino substituents, and also ionogenic substituents, they are readily usable in the dyestuifs used in our invention in the same Way as the azo dyestulf residues.

Examples of some of the anthraquinonoid compounds which may be used to form the dyestuffs used in our invention are:

1-amino-4-(4-aminophenylamino) anthraquinone 2,3-

di-sulfonic acid 1-methylamino-4a(4'-aminophenylamino -anthraquinone- 2,3-disulfonic acid 1-amino-4-(4-aminophenyl) anthraquinone disulfonic acid 1-amino-4-(4'-aminophenylamino) anthraquinone-2,3,

5'-trisulfonic acid 1-amino-4 (4'[4" aminophenylazo] anilino) anthraquinone-2,5,2"-trisulfonic acid 1-amino-4 (4 [4" aminophenyl] anilino) anthraquinone-2,5,3-trisulfonic acid 1-amino-4-(4-aminophenylamino) anthraquinone 3'- sulfonic acid 1-amino-4-(3 aminophenylamino) anthraquinone 4- sulfonic acid 1-amino-4-(4' aminophenylamino) anthraquinone 2- sulfonic acid 1-amino-4-(3'-amino 4 methylphenylamino) anthraquinone-Z-sulfonic acid 1-amino-4-(4 amino 3' methylphenylamino) anthraquinone-Z-sulfonic acid 1-amino-4-(3-amino-4,6 dimethylphenylamino) anthraquinone-Z-sulfonic acid 1-amino-4-(4'-aminophenylamino) anthraquinone 3'- sulfonic acid diethylamide In addition to this there is a class of anthraquinonoid compounds which may be represented by the formula:

SO H

g I IH-ANHR in which Y is hydrogen or sulfonic acid and A represents an arylene radical which may be further substituted with acidic groups such as sulfonic acid or carboxylic acid and where R is hydrogen, alkyl, aralkyl or cycloalkyl. The aromatic diamine portion of this molecule NHANHR may be derived from various aromatic diamines such as:

m-Phenylene diamine p-Phenylene diamine Benzidine Dichlorobenzidines 4,4'-diaminoazobenzene m-Phenylenediamine-4-sulfonic acid p-Phenylenediamine-3-sulfonic acid Benzidine-3-sulfonic acid p-Phenylenediamine-2-sulfonic acid 4-,4-diaminoazobenzene-2-sulfonic acid p-Phenylenediamine-Z-carboxylic acid and the like.

Of especial importance along this line are the acid anthraquinone dyes described in chapter 29 of Venkataraman, pages 834-860, wherein a large number of compounds having the characteristics desirable for use in the preparation of the dyestuffs used in our invention are found. Also of especial interest in preparing the dyes of our invention are the solubilized vat dyes described in chapter 34, pages 1046-1058 of Venkataraman. The importance of the solubilizing technique of forming leuco sulfuric acid ester salts of the vat dyes is that a great many of the vat dyes otherwise unusable because they lack solubilizing groups can, by this technique, be converted into compounds which can form the dyestuff residue in the dyesof our invention. Such dyes need an extra aftertreatment in addition to the acid curing to convert the leuco ester to the oxidized form. This aftertreatment is an oxidation such as is normally used in the treatment of goods printed or padded with soluble vats.

PHTHALOCYANINE RESIDUES The phthalocyanine structure is known to be a highly stable and highly colored chemical structure. Its use in pigments is Well known and is described in Venkataraman, chapter 38, pages 11184142. Various amino substituted phthalocyanines are known including many which are sulfonated or carboxylated or otherwise substituted by an acid grouping. Similarly, ones are known with quaternary amino substituents. Such compounds are readily usable in preparing the dyes of our invention. The amino groups may be directly on the phthalocyanine rings or they may be in a side chain such as an aminomethyl group or an aminosulfonanilide group. The side chain is preferred because of ease of preparation, since such products can be prepared from the phthalocyanine itself by treatment with methylolphthalimide and sulfuric acid as described in the United States Letters Patent 2,761,688 to Lacey. Sulfonation can occur at the same time under the proper conditions and up to four amino methyl groups can readily be introduced as well as up to four sulfonic acid groups. Also phthalocyanine carboxylic acids can be aminomethylated in the same manner. Similarly, the nuclear substituted phthalocyanines such as those containing one to four chlorines can be sulfonated and aminomethylated. The total number of substituents should not exceed nine in one phthalocyanine molecule. The phthalocyanines are used either in the form of the metal-free phthalocyanine or in the form of copper, cobalt, nickel or other metal complexes in which form they are also used in our invention.

The other classes of dyestufis which are known are generally of less importance than the three classes described above. However, they may have the necessary combination of an acid grouping and a primary or a secondary amino group, and when they do they can be used in the preparation of dyestuffs of our invention. Compounds having the.necessary prerequisites can be found among the xanthene, acridine and azine dyestufis, e.g., described on pages 740495 of Venkataraman.

A complete line of the dyes of our invention will necessarily include azo structures, vat structures, and phthalocyanines, at the least,-in order to get the minimum variety needed of colors and properties.

THE HYDROXYMETHYLATION REACTION The discussion above has dealt with the dyestuff residue which gives the coloring component to the dyestuffs used in our invention. For the coloring constituents of the dyes used in our invention we take from the known classes of dyestnifs, as has been discussed, as long as the necessary characteristics of a solubilizing ionogenic substituent and a primary or secondary amino to form a link to the triazine nucleus are present. It it is now necessary to discuss in more detail the part of the struc-.

ture of our modified cellulose which is the link between the dye residue and the textile fiber.

The dyestuffs used in our invention are fundamentally dyes which react with the fiber. In order to achieve this, we place uponthe known dyestuff molecules a diaminotriazinylamino substituent and then react formaldehyde with the amino groups on the triazine ring, to form bydroxymethylaminotriazine derivatives. Normally we start with either 2,4-dichloro-6-amino-1,3,5-triazine or 2,4-diamino-6-chloro-1,3,S-triazine. When the chlorines of these two compounds have been replaced with the residue of a dyestutf linked to the triazine ring through an amino or secondary amino group, the resultant aminotriazines are then reacted with formaldehyde to form the methylolaminotriazine derivatives which are the dyes used in our invention. The same result can be achieved by reacting cyanuric chloride with amino dyestuffs to replace either one or two of the chlorines by the residue of the dyestuff linked to the triazine through an amino group. The remaining triazine chlorines can then readily be replaced by amino groups by reaction with ammonia to give the same intermediates as are obtained from the amino chloro triazines and the amino dyestuffs. Various degrees of methylolation are possible, depending on the amount of formaldehyde used and the reaction conditions. At least one hydroxymethyl group must be present on a triazineamino group. Usually more are preferred. Some of the various possibilities are illustrated in the following formulae, in which DNH represents the dyestuff residue as described above:

Although these formulae all show the D linked to the triazine through an NH group, it should be understood that the NH may also be an NR where R is a lower alkyl organic radical (i.e., the dyestuff might have had a secondary amine instead of a primary amine). The main thing that these various structures illustrate is the varying degree of methylolation of the triazinylamino groups and the various combinations of dyestuff residue and triazine rings. Either one or two methylol groups may be substituted for hydrogen atoms on each triazinylamino group. At least one methylol group must be present in the dyestuffs used in our invention.

The extent of methylolation will depend on the amount I forming alkoxymet'nylamino derivatives. Such alkylation gives an added stability to the molecule but the product can be applied to the fiber in the same manner as the methylolaminotriazine derivatives. The alcohols which may be used include the ordinary alkanols such as methanol, ethanol, propanol, butanol, hexanol, lauryl alcohol, octadecyl alcohol and the like. In addition, secondary and tertiary alcohols such as secondary and tertiary butanol and triphenyl carbinol and substituted alcohols such as ethylene chlorhydrin, glycol, ethoxyethanol, polyglycols and the like can be used. In general, since water solubility is desired, the lower alkanols such as methyl and ethyl are preferred. Higher alcohols tend to give water insoluble materials but this effect can be overcome by the presence of more acid groups in the molecule. Also the use of polyglycols tend to confer water solubility.

APPLICATION OF THE DYES The above dyes may be applied to various types of cellulosic fibers such as cotton, viscose rayon, acetate rayon, cuprammonium rayon, and the like, or blends of these with each other to form species of our invention. In addition, they may be applied to any other blends of these fibers with nylon, glycol, polyterephthalate or polyacrylonitrile, or other synthetic fibers having reactive hydroxyl or amino groups.

The method of applying the dyes to form our invention involves a heat curing treatment whereby the dye becomes more firmly affixed to the fiber. During the curing period a reaction takes place between the methylolamino or alkoxymethylamino group and the fibrous material so that an actual chemical bonding takes place. The fibers of our invention are thus chemically modified fibers and not the original fibers merely colored. The fibers of our invention should have at least 0.01% of their total weight as the dye-modified triazine moiety in chemical combination with the fiber.

In applying the new dye to fabrics, the dye may be applied by a dyeing procedure, by a padding procedure, or by a printing procedure, such as are standard in the dyestufi' industry. After the dye has been applied the dyed fabric is dried. -It is then necessary to cure the dyestuff by heating, a process which effects condensation of the methylolamino or alkoxymethylamino groups with the fiber and consequently achieves direct chemical bonding of the dyestuff to the fiber. Unreacted dyestuff is then removed by a light soaping after treatment.

The temperatures, concentrations, pHs, catalysts, drying times and curing times will vary depending on the dye and fiber. Typical conditions can be exemplified by the conditions for application to cotton of the dyestuff:

This dyestutf is applied from solution at a pH between 3.75 and 9.2 by padding at 90 C. for about 2 minutes. After mechanical removal of excess dye solution the dyeing is dried at 160 F., then oven cured at 350 F. It is then soaped at the boil for five minutes.

In general, padding is carried out at any temperature from 10-90" C., with about 35 C. being preferred. The pH preferred is -7. Drying is carried out at 70120 C. with about 100 C. being preferred. The cure is carried out from l202l0 C. with ISO-175 C. being preferred. Curing is carried out from /2 to 3 minutes with 1 /2 to 2 minutes preferred, the time varying inversely with the temperature of cure,

Curing'requires an acid catalyst, at least 2% by weight based on the dyestutf, with the exact preferred amount being a function of the individual catalyst. Catalysts which can be used include magnesium chloride, zinc chloride, Zinc nitrate, aluminum nitrate, isopropanolamino hydrochloride, butanolamine hydrochloride, ammonium sulfate, diammonium hydrogen phosphate, ammonium chloride, oxalic acid, tartaric acid, phosphoric acid or suitable mixtures thereof. Especially preferred are 10-20% by weight of zinc nitrate or 70% isopropanolamine hydrochloride.

It is an advantage of our invention that these dyemodified fibers have greatly improved wash fastness and crock fastness over the fibers dyed with amino dyestuffs not containing an amino triazine residue. The dyestuffs used in our invention being bonded directly to the fiber, do not wash or rub off, as do those fixed by substantivity only. Even when the dyestuif residue is linked to a diaminotriazine radical which has not been reacted with formaldehyde to form the methylol derivative, the product is not fast to Washing and crocking. It is absolutely necessary for such properties to have at least one methylol group substituting the amino groups and preferably more.

This application is a continuation-in-part of our copending application, Serial No. 769,995, filed October 28, 1958.

Our invention can be illustrated by the following examples which parts are by weight unless otherwise specified.

Example 1 a OH NH- N H A solution of 8.3 parts of H-acid (8-amino-1-naphthol-3,6-disulfonic acid) in 400 parts of water and 10.6 parts of sodium carbonate is heated to 70 C. and to it is added 7.3 parts of 2-chloro-4,6-diamino-s-triazine. The mixture is heated at the reflux temperature until a test shows the absence of aromatic amino group. The solution is then cooled to 10 C. and some ammeline is removed by filtration as the sodium salt. The solution of the triazine product is used for the coupling in Example 2.

A. diazo solution from orthanilic acid is prepared by diazotizing 4.0 parts of orthanilic acid by suspending 4 parts of orthanilic acid in parts of water at 25 C. and adding approximately 10 parts of 10% sodium hydroxide solution. After icing to 0 C., approximately 33 parts of 10% hydrochloric acid is added and the diazotization carried out by adding approximately 22.7 parts of normal sodium nitrite solution. After stirring a short'time, the diazo is added to the solution of condensation product of Example 1 maintaining the pH at about 9.

After coupling is complete, the mixture is heated to 70C. and 7.5 parts of 36% formalin is added (2.65 parts real). The mixture is heated at 7075 C. for a short period giving a solution of the methylolamido derivative containing two methylolarnido groups per molecule. The dye is isolated by salting out from the solution by the addition of sodium chloride.

The extent of methylolation maybe increased by fur- 13 ther treatment with formaldehyde. Thus, by heating 75 parts of the above solution with 3.75 parts additional 36% formalin for 2 /2 hours, a dye is formed containing three methylolamido groups per molecule.

Example 3 Naosis N N=N NH( TNwmoH), NaO S (3113 N N Nnomon 42.1 parts of the dye obtained by coupling the diazo of 7-aminonaphthalene-1,3-disulfonic acid to m-toluidine is dissolved in 300 parts of water and the pH is adjusted to 6.5 to 7.0 by the addition of dilute hydrochloric acid. 14.6 parts 2,4-diamino-6-chlorotriazine is added and the resulting slurry is heated at reflux with good stirring until the reaction is substantially complete. Sufiicient sodium carbonate solution is added to maintain a pH of 6.5 to 7.5.

The mixture is cooled to 70 C., and clarified to remove some insoluble material. The product is then isolated by salting with 45 parts sodium chloride, yielding 53 parts of the diaminotriazinyl dye intermediate.

The above intermediate is slurried in 250 parts water and 125 parts methanol. The whole is then heated to reflux with good stirring. A solution of 21 parts .paraformaldehyde, dissolved in 20 parts 37% formalin, 50 parts methanol, 25 parts water and 1 part N sodium hydroxide is added gradually to the dye slurry. After about half has been added a solution is formed. The pH is kept at 8.5-9.0 by the occasional addition of 5 N sodium hydroxide. After the formaldehyde addition is complete the whole solution is heated an additional four hours at reflux. The hot solution is then filtered. The filtrate is then evaporated at 50-60" C. under reduced pressure to a thick viscous syrup. The syrup is then triturated with 60 parts methanol and poured into a well stirred solution of 1000 parts acetone forming a bright yellow precipitate. The solid is collected by filtration and washed with 50 parts acetone, then dried at 30-35" C., yielding 61 parts Example 4 Two parts of the dye, the product of Example 3 con taining three methylolamido groups, is dissolved in 96 parts of water and to this solution is added 4 parts of a 10% solution of zinc nitrate, giving a solution with a pH of about 5.5. Cotton fabric is padded through this solution and passed through rolls adjusted so that the pick-up is approximately 85%. The fabric is dried approximately two minutes at 225 F. and then cured for one and one-half minutes at 350 F.

The dyeing is then soaped at 160 F. in a solution containing 0.64 oz. per gallon of neutral oleate soap and 0.25 oz. sodium carbonate per gallon, rinsed and dried at 225 F. The cot-ton fabric is dyed a bright red color with excellent wash fastness and crocking properties.

In place of the dye used above one may use the products of Examples 9, 33, 40, 45 or 48.

When the above procedure, using the same quantities, is applied to viscose rayon instead of cotton, a similar dyeing with equal fastness is obtained.

Example 5 sO Na OH NHz 01 N 8.0 as S O 3N3 A diazo solution was prepared from 4-methyl-5-chloroorthanilic acid by first preparing a solution of 44.1 parts of this compound in 400 parts of Water at 0 to 5 C. containing 8 parts of sodium hydroxide. Then 26.5 parts of 10% hydrochloric acid is added and the diazotization is carried out by the addition of 12.4 parts of sodium nitrite (180 parts approximately of a 1 N solution). After stirring a short time to 05 ,C. the diazo solution is adjusted to a pH of 2.5 and is coupled With H-acid in 800 parts of water together with 24 parts of sodium hydroxide and 19.5 parts of sodium carbonate. The mixture is stirred at room temperature until tests show that the coupling is complete. By the addition of 500 parts of sodium chloride, 123 parts of the final dye is precipitated.

A solution of 25 parts of the sodium salt of the dye of Example 5 above in 800 parts of water is prepared. To the solution is added 17 parts of sodium carbonate resulting in a pH of about 10 and the mixture is then heated to C. To this mixture is added 11.6 parts of 2-chloro- 4,6-diamino-s-triazine. It is then heated to reflux and kept at the reflux temperature for an extended period until the reaction is substantially complete. Sufficient sodium carbonate solution is added after part of the heating period to maintain a pH of approximately 10. After the mixture is cooled, some insoluble material is removed by filtration and the product is then isolated by salting out of solution by the addition of parts of sodium chloride.

Example 7 SOaNa OH NH 7 Cl NaO s A solution of 15 parts of the diaminotriazine compound prepared in Example 6 in 700 parts of water is prepared with stirring at a temperature of 87 to 90 C. for an extended period of time until the reaction is substantially complete. After heating for about half the period, the pH is found to have fallen to'between 7 and 8 and an 15' aqueous solution of 4 parts ofsodium carbonate is added to bring the pH to about 10 again. After completion of the heating period, the mixture is cooled, and the product is salted out by the addition of 150 partssodium chloride.

Example 8 A solution of 20 parts of the dye prepared in Example 5 in 800 parts of water is added to a solution of 43.7 parts of 1,3-di-o-tolylguanidine (DOTG) in 800 parts of water containing 7.73 parts of hydrochloric acid, heated to 90 C. The pH 'of the resulting mixture is about 4m 5. The mixtureis'stirred until the reaction is substantially complete. The solid product is removed by filtration, washed well with water and finally dried.

A mixtureof 22 parts of the di-o-tolylguanidine salt prepared above, 12.7 parts of 2-chloro-4,6-diamino-s-triazine and 300 parts of nitrobenzene'isheatedi at about 150-200 C. untilthe reaction is substantially complete. Thesolid salt is removed by filtration and washed well with benzene and 95% alcohol.

The ditolylguanidine salt is converted to the sodium salt by hydrolysis with sodium carbonate solution. Thus, to a solution of 19' parts of the ditolylguanidine salt, prepared above, in 1000'parts of water is added'approximately 65 parts of sodium carbonate solution. The mixture is then heated at the boilingpoint, cooled and the diaminotriazine dyestuff in the form of its sodium salt is obtained by salting out of the clarified solution with sodium chloride.

A solution of 3.44parts of paraformaldehyde and 0.8 part of 37% formalin is prepared in 195 parts of water at 75 C. containing'a small amount of sodium hydroxide. The pH of the solution is adjusted to 8.5 to 9.5 by addition ofdiluteformic acid'and to it is then added 10 parts of DOTGOaS ij soano'ro the sodium salt of the diaminotriazine derivative of the product prepared above in Example 6. The mixture is heated gradually to 8285 C. and is then refluxed gently for about 20 minutes. After cooling, the methylolamido product is isolated from the solution by salting out. The

16 mately 85%. The fabric is dried approximately two minutes at 225 F. and then cured for one and one-half minutes at 350 F.

The dyeing is'then soaped at 160 F. in a solution containing 0.64 oz. of neutral oleate soap and 0.25 oz. of sodium carbonate per gallon, rinsed and dried at 225 F. The cotton fabric is dyed a bright red color with excellent wash fastness and crocking properties. When other resin finishes for textiles, such as the melamine resins, ezg. trimethylol melamine, hexarnethylolmelarnine, or the urea resins, e.g. dimethylolurea or dimethylolethyleneurea, and the like are substituted for the above mentioned methoxymethylrnelamine, one obtains equally good results.

In the above example, if the quantity of tris-methoxymethylmelamine used is twice that indicated, the fabric is similarly dyed, and in addition shows an improvement in wrinkle recovery of the order of 100 (warp plus fill) over the. untreated fabric when tested by the Monsanto crease angle test.

Example 11 A print paste is prepared consisting of 3 parts corn starch, 1 part tapioca flour, 8.3 parts gum tragacanth (6 oz. per gallon), 1.5 parts of the rnethylolated dye which is. the product of Example 3, and 0.3 part zinc nitrate in 43 parts of water. The resulting paste is printed on cotton, which is then subjected to a cure at 325 F. for two minutes. The cured print is soaped at 160 F. in a bath containing neutral oleate soap and sodium carbonate, and dried. The resultant print is a bright shade of good wash and'crock resistance.

Example 12 To asolution of 3 parts of a styrenated alkyd resin in 10 parts of xylene-and 81.6 parts'of a hydrocarbon solvent, is added, with high speed stirring, a solution of 2.7 parts ammonium sulfate in 224 parts of water. A thick emulsion is thus formed, to which is added a color concentrate consisting of 10.5 parts of the methylolated dye which is the product of Example 3, and 2.1 parts of zinc nitrate, in 100 parts of water. The resultant color emulsion isprinted on cotton fabric. The printed fabric is cured at 325 F. for two minutes, washed in a neutral oleate soap bath containing sodium carbonate, rinsed, and

product contains nearly four methylol groups per molecule.

Example 10 To. this 1,

dried. The fabric is printed a bright shade of excellent crock and wash fastness.

Example 13 N HzN-f W-NII; N N

HIIIH DOTGO3S SOaDOTG An aqueous-solution of di-o-tolylguanidine is prepared by' dissolving 62.2 parts in 1000 parts of water containing approximately l08'parts of10% hydrochloride acid.

An aqueous solution of parts Direct Blue 23 (Color Index No. 406-, 40% real) in 3000 parts of water is added to the ditolylguanidine solution at 90 C. resulting in a temperature of 53 C. (pH approx. 5.0). After stirring for 1 /2 hours, the solid ditolylguanidine salt is recovered by filtration, washed with water anddried.

Twenty-five parts of the DOTG salt of the Direct Blue 2B prepared above'and 10.2 parts of 2-chloro-4,6-diaminos-triazine-are added 'to' 300' parts of nitrob'enzene; The mixture is heated until the reaction is substantially complete, withstirring at to 200 C. and then cooled to-room -temperature. The precipitated product is repassedihroughrolls adjusted so thatthe pickup'is approxi- 75 moved by filtration, washed with'95% alcohol and dried.

Exzzr nzle 14 A solution of 50 parts of paraformaldehyde and 20 HOCHQHN N Nnomon HOCHQHN-( TNHCHzOH N N N N N OH on NH mots SO Na NaOaS SO Na To 15 parts of the DOTG salt of the diamino-triazine compound prepared above in Example 13 in 1000 parts of water, is added suflicient sodium carbonate solution to product a pH of 9.7 (4.4 parts of sodium carbonate as a 10% solution). The solution is then heated at 90 100 C. The sodium salt of the diamino-triazine dye compound may be isolated from the clarified .solution by salting out with sodium chloride. To one-half of the above solution (pH 9.2) is added parts formaldehyde as a 37% solution. The mixture is heated at 8590 C. for about 5 hours. The methylol product is salted out by the addition of sodium chloride and isolated by filtration Example 15 M10 33- SOaNfi.

NH on N H:N- N

NH O H S O 3N8.

N80 aS- Cl A solution of 127 parts of the dye of Example 5 in 2500 parts of 'water is adjusted to a pH of 7 by the addition of sodium bicarbonate and hydrochloric acid. The temperature is adjusted to 25 C. and to it is added a solution of 16.5 parts-of 2-amino-4,6-dichloro-s-triazine in 300 parts of acetone. To the mixture is then added slowly 106 parts of 10% sodium carbonate solution, keeping the pH below 7.5. The temperature during the addition of the first half of the sodium carbonate solution is held at 60-65 C. and is then increasedto the reflux temperature for the addition of the latter half of the sodium carbonate solution. The mixture is then heated at the reflux temperature until the reaction is substantially complete. The product is then salted out by the addition of sodium chloride, removed by filtration, washed and dried.

parts formalin is prepared in 500 parts of water containing 20 parts of N/ 10 sodium hydroxide solution. The pH of the solution is adjusted to 9.0 with formic acid and to it is added 26.5 parts of the aminotriazine dye prepared in Example 15. The resulting solution at a pH of 9 is heated at the reflux temperature for /2 hour. After cooling to room temperature and clarifying, the product is salted out, removed by filtration, washed and dried.

Example 17 NHCHBOH The procedures of Examples 1 and 2 are followed using an equivalent amount of aniline diazotized in the usual way in place of the diazotized orthanilic acid. The product, isolated, has the above formula.

If an equivalent amount of para-nitroaniline, paranitro- 2-methoxyaniline, alpha-naphthylamine, l-aminoanthraquinone, 2-methoxy-5-diethylsulfonamide aniline, 2- methoxy-S-ethylsulfonylaniline, or Z-aminopyridine is used in place of the aniline, the correspondingly substituted dyestuif is obtained.

Example 18 NH: 0 H3 N I OH Ill H-acid, the correspondingly substituted product is obtained.

Example 19 NHCHZOH CH A bi equivalent weight of sodium-4-arnino-2-trifluoromethyl benzene sulfonate is diazotized in water by acidification with equivalents of real hydrochloric acid followed by the addition of a slight excess of sodium 19 nitrite solution. The diazo solutionis added to a sodium acetate buffered solution of the product of Example 18 in which the pH is held at between 5 and 7. After the coupling is complete the mixture is heated to 70 C. and' slightly over of an equivalent weight of real formal,- dehyde is added as 36% aqueous solution. The mixture is heated at 7075 C. for a short period. The final dye is isolated by salting from the solution with the addition 15 of sodium chloride.

If an equivalent quantity of. 2-aminodipheny1-ether-4- sulfonic acid, 4-aminoazobenZene-4'-sulfonic acid, 2- amino-5-chlorotoluene-4-sulfonic acid, dehydr'othiotolui- 20. is then added to the reaction mixture with stirring, while maintaining the pH at about 9. The product is then reacted with formaldehyde in the same manner as in Example 2, but using a double quantity of formaldehyde.

5 The result is the unsymmetrical dye of the above structure.

Example 21 on NH; outon),

The procedures of Examples 8 and 9 are followed using in place of the product of Example 5 an equivalent quantity of Azo Dark Green A (Color Index No. 247), and using'equivalent quantities of both the 2-chloro-4, 6-diaminotriazine and the formaldehyde. The result is dine sulfonic acid, 2-aminonaphthalerie-4,8-disulfonic acid 20 k gl' l dyestuff having excellent dyeing P P tiesor 1-aminonaphthalene-4-sulfonic acid is used in place of SOaNa 18 is used with any of thesediazo components, the cor- 4 respondingly substituted dyestuff is obtained.

Example 20 HOOHrHN I OH The procedure of Example 2 is followed using a double equivalent amount of tetrazotized benzidine in place of the orthanilic acid. This produces a mono-coupling with the H-acid derivative. A solution of a J-acid derivative Example 22 NaOaS NaO s XOHZ N N (HO CH2) gNiNiNfllHzoHh N HOCHzHNI TNHCHzOH OH NH NaO 8- SO 3N8.

fastness and reactivity to cellulosic fibers, when applied by the method of Example 4.

Example 23 N (HO CHmN Tmoniorm Naoas is prepared by the procedure of Example 1 using an amount ofJ-acid equivalent to the H-acid; This solution NH OH The result is agreen dye of excellent light 21 22 lent quantity of Chloramine Green B (Color Index No. diazo component in place of the aminophenolsulfon- 589), to give the product of the above structure. amide, 1-aminonaphthalene-4-phosphonic acid sodium 7 Example 24 Salt.

C| H OOONa Naois N=N N=N N=N N=N-OH Naois -so,Na NH N (HOCH2)nNLNJN(CH2OH)2 The procedures of Examples 8 and 9 are followed Example 28 using in place of the dye of Example an equivalent quantity of Trisulfone Brown B (Color Index No. 561), COO and using double quantities of both the chlorodiaminotriazine and the formaldehyde. 2() CH3 l fiN=N'- Example 1% N I NHCHzOH NH W The procedure of Example 26 is followed using in place of the aminophenosulfonamide an equivalent Thirty-seven parts of 1-m-aminophenyl-3-methyl-5- q n i y of anthranilic ac dpyrazolone and 18 parts of 2-ch1oro-4,6-diamino-s-triazine are added to 300 parts of nitrobenzene. The mix- Example 29 ture is heated with stirring at 190-200 (3., until the reaction is substantially complete and then cooled to room temperature. The precipitated product is removed by fil- K tration, washed with alcohol and dried. N V

Example 26 The procedure of Example 8 is followed using an 0 -o-0 s0, equivalent quantity of p-aminoacetanilide in place of the l l di-o-tolylguanidine salt of the dyestuif as prepared in the first paragraph of that example. The hydrolysis in the N third paragraph is carried out using sodium hydroxide instead of sodium carbonate to yield the free amine of IIIHOHBOH the above structure. r0 Similarly, the p-aminoacetanilide may be replaced with N o 1-amino-4-acetylamino naphthalene, l-amino-S-acetamf idonaphthalene, 2-amino-6-acetamidonaphthalene, 4- NHOHZOH amin0-4-acetamido stilbene, 4-arnino-4'-acetamidobiv henyl or 4-amino-4'-acetamidoazobenzene to give simi- The procedure of Example 2 1s followed using in place P of the product of Example 1, the product of Example 25 i g ggg f i P531? gther i of a in equivalent quantities and using as the diazo comof the g g g t f ponentin place of orthanflic acid Laminophenold'sul noanilide such as 4-aminobenzanilide 4-a inino-prol iorifonamlde' anilide, 4-aminobutyranilide, and the like are used in Ex mpl 7 equivalent quantities to the p-aminoacetanilide.

q Example 30 COONa NHCH OH One mole part of the product .of Example 29 is dis- The procedure of Example 26 is followed using as the solved in a mixture of 25 parts of concentrated hydro- 23 chlon'c acid and 75 parts of water. The mixture is cooled below and the amino group is diazotized by the addition of over 1 mole part of sodium nitrite in the form of a normal sodium nitrite solution and stirred at this temperature until diazotization is complete. The diazo solution is then added to a solution of one mole part of 2-hydroxy-3-naphthoic acid in 50 parts of water and containing 5 mole parts of sodium hydroxide. The mixture is stirred until the coupling is complete. The product is then treated with slightly over 2 mole parts of formaldehyde solution after adjusting the pH to about with formic acid. Sodium carbonate solution is added to maintain a pH of approximately 10. The mixture is heated to reflux and kept at that temperature for an extended period until the reaction with formaldehyde is substantially complete. After the mixture is cooled, the product is isolated by salting out with sodium chloride.

Example 31 SO N3.

N NE

The procedure of Example 1 is followed using l-amino- 5-acetamidonaphthalene-3,7-disulfonic acid in place of the 8-amino-1-naphthol-3,6-disulfonic acid in equivalent quantities. The. acetyl group is, then hydrolyzed as in Example 29.

Example 32 s oaiva HOGHz-HN The procedure of Example 2 is followed using an equivalent quantity of the product of Example 31 in F place of the orthanilic acid and using an equivalent quantity of 2-hydroxy-3-naphthoic anilide (Naphthol AS) in place of the product of Example 1.

By using equivalent quantities of other 3-hydroxy-2- naphthoic arylides known to the art as the various Naphthol AS coupling components, the corresponding dyestulis are obtained.

1 amino-4-(4-acetamido)anilinoanthraquinone-Z-sulfonic acid (47.3 parts as the free acid) is added portionwise to a mixture of 430 parts of 99.5% sulfuric acid and 142 parts of 30% oleum, at l520 C. The mixture is heated at 40 C. for 6 hours, cooled to room temperature, and drowned in a mixture of 2000 parts wa ter, 1600 parts ice, and 530 parts sodium chloride. The slurry is stirred at room temperature for three hours, and the product is collected by filtration and washed free of acid with 20% brine. The wet cake is then treated with 1900 parts of 5% caustic at C. for one hour to hydrolyze the acetamido group, giving 1-amino-4-(4'-amino- X-sulfo)anilinoanthraquinone-2-sulfonic acid.

This intermediate is treated with 2,4-diamino-6-chlorotriazine according to the procedure of Example 3, and the resulting diaminotriazinyl derivative reacted with formaldehyde, to give the trimethylol dye, by the procedure of that example.

In place of the l-amino-4-(4'-acetamido)-anilinoanthraquinone-Z-sulfonic acid used in the above example, one may use the disulfonic analog, namely l-amino-4- (4'-acetamido) anilinoanthraquinone-2,5 (or 8)- disulfonic acid or the mixture of isomers. In that case the final product is the trisulfonic acid analog of the above methylolated dye.

The same dyestutf is obtained when the procedure of Example 40 is followed using the diaminoanilinoanthraquinone starting material in equivalent amounts to the phthalocyanine sulfanilide compound in the reaction with cyanuric chloride, followed by ammonolysis as described there.

The procedure of Examples 8 and 9 are followed using in place of the dye of Example 5 an equivalent quantity of l-amino 4-(4'-aminophenylamino)anthraquinone-3- sulfonyldiethylamide and heating the reaction mixture of the di-o-tolylguanidine salt and chlorodiaminotriazine at -150 C. instead of at higher temperatures used there.

Example 35 O N H: H

SOaNa NHOHZOH 0 H- -NH N NHCHzOH The procedures of Examples 8 and 9 are followed using, in place of the amino dyestufi of Example 5, an equivalent quantity of 1-amino-4-(4-aminodiphenylamino)anthraquinone-Z-sulfonic acid and a lower reactron temperature as in Example 34. V

25' Example 36 sodium carbonate being used to basify the entire mixture.

NHGHROH The procedures of Examples 8 and 9 are followed using in place of the dye of Example 5, anvequivalent quantity of 1-amino-4(4-aminoazobenzene-4-amino)- anthraquinone-2,2'-disulfonic acid, using a lower reaction temperature as in Example 34.

Example 37 N uooumf Truncation N N SOQNa NH? ITTH NH O NH SOaH N N Example 38 (|)Na (ljNa 8'02 Slot O NaO-SOa-O NH 0-SO2ONa H1? (HO CH2)2N N N(CHOH)2 A A mole quantity of 4-benzamido-1,1-dianthrimidecarbazole is hydrolyzed to the free monoaminodianthrimidecarbazole by heating in times its weight of 90% sulfuric acid at 80 until hydrolysis is complete. The product is isolated by drowning in water, filtering, washing and drying. This product is then substituted in the procedure of the second paragraph of Example S for the di- The pyridine is removed by vacuum distillation and water is added during the distillation to keep the mixture from becoming too concentrated. The solution is then clarified by means of a filter aid. The aqueous solution of ester is then used in the process of Example 9. In salting out and isolating, it is necessary to wash the product with saturated sodium chloride solution. The product must be dried in a vacuum in order to avoid decomposition by heat.

Example 39 NHCHBOH NHCHBOH 4 (Pcy-phthalocyanine) The procedure of Example 8 is followed using tetraarnino copper phthalocyanine disulfonic acid in equivalent amounts in place of the dye of Example 5 and quadruple amounts of chlorodiaminotriazine. The product is then subjected to the procedure of Example 9 using double equivalent quantities of formaldehyde. The resulting phthalocyanine derivative dyes fibers a very fast blue shade by the method of Example 4.

Example 40 NH 011201;) f H OuPcy(S03Na)z so2Nn-ONH N L H V N(CH2OH) 2 Copper phthalocyanine, 57.5 parts, is chlorosulfonated, by reaction with 537 parts of chlorosulfonic acid at 130- 140 C. The crude product is treated with 15 parts of p-aminoacetanilide in aqueous acetone at room temperature for 18 hours, and the acetamido group is hydrolyzed in hot aqueous caustic. The product at this stage analyzes as the disulfonic acid derivative of copper phthalocyanine p-aminosulfonanilide. This is then converted to its dichlorotriazinyl derivative by reaction with 18.5 parts of cyanuric chloride in aqueous acetone at 05 C. an pH 6 to 7.5. The product is recovered by salting and filtration.

The dichlorotriazinyl derivative of disulfo-copperphthaiocyanine-p-aminosulfonanilide, in the form of its wet cake is added to 100 parts of 28% aqueous ammonia, keeping the temperature below 10 C. The mixture is then allowed to rise to room temperature during one hour, heated to 95-100 C. during two hours, and held orthotolylguanidine salt of the dyestuif of Example 5. The

resulting diaminotriazinylamino anthrimide carbazole is then reduced and esterified by the following procedure. The product is added to a pyridine solution to which chlorosulfonic acid had been added in sufficient quantity to prepare 5 moles of pyridine-S0 per mole of the anthrirnide carbazole being added. The pyridine used is about 10 parts by volume per part of anthrimide carbazole. Iron powder is added gradually and the mixture is stirred below 50 C. until the formation of the leucosulfuric ester is substantially complete. It is then drowned at this range for three hours. The mixture is cooled, made strongly alkaline with caustic, and boiled to remove excess ammonia. The diaminotriazinyl derivative thus obtained is isolated by acidification of the mixture and filtration. It is then methylolated by treatment with formaldehyde in the manner of Example 3. The product is the trimethylol derivative.

Example 41 NHCHzOH] aevaasa Example 42 The procedure of Example 39 is followed using bisaminomethylphthalocyanine disulfonic acid in place of the tetraaminophthalocyanine disulfonic acid. The diaminochlorotriazine is used in only double quantities over the usage of Example 8, but the formaldehyde is also used in double quantities over that of Example 8.

(S OaNa) 2 Example 43 NH-OHzOOHs Six hundred and fifty-three parts of paraformaldehyde (containing 91% formaldehyde) are dissolved in 390 parts of methanol in 131 parts of water containing about 1.1 parts of 50% triethanolamine in about 1.2 parts of 20% sodium hydroxide solution by warming and stirring. The pH of the resulting solution is adjusted to 8.1 with formic acid. Eight hundred and sixty parts of 2,4-diamino-6-chlorotriazine is then added. The mixture is heated to 50 C. and held at that temperature until the reaction is substantially complete. Two thousand and ninety parts of methanol are then added followed by 6.4 parts of oxalic acid crystals. The reaction mass is then again heated to 50 and held at that temperature until the cloudy mixture has become clear. The reaction mixture is then slightly cooled and neutralized with 20% sodium hydroxide until the pH is approximately 10. The mixture is clarified through a filter aid and the filtrate is concentrated to a highly viscous syrup. The result is clear, completely water soluble viscous syrup of approximately the above formula. The proportion of formaldehyde to the triazine nucleus and of the methylation of methylol groups will vary from batch to batch.

If, in place of the methanol, ethanol is used the corresponding ethylated compound is obtained.

The procedure of Example 6 is followed using the product of Example 43 instead of equivalent amounts of the 2-chloro-4,6-diaminotriazine. The resulting product is dyestuif of the above formula. The same product is obtained by the use of equivalent amounts of the product of Example 6 instead of the 2,4-diamino-6-chloro-striazine in the process of Example 43.

28 Example 45 O NHz SO Na NHCHzO CH3 0 NH -NH- N so Na NHCIIQO CH;

The process of Example 6 is followed using an equivalent quantity of the product of Example 43 in place of the diaminochlorotriazine and the starting dyestutf of Example 33 in place of the dye of Example 5. The same product is obtained by using the starting material of Example 33 in the procedure of Example 43 in equivalent amounts in place of the diaminochlorotriazine used in Example 43.

Example 46 NH-CH2OH The process of Example 9 is used, using in place of the product of Example 6 diaminochlorotriazine in equivalent amounts. One-half of the quantity of formaldehyde used in Example 9 is used to give the product. When the full quantity of formaldehyde used in Example 9 is used, a tetramethylol derivative is obtained.

Example 47 The process of Example 8 is followed using the product of Example 46 in equivalent quantities in place of the chlorodiaminotriazine, the resulting product is the same as that of Example 9 orone of similar structure having more or less methylol groups depending on the amount of lformaldehydeused in Example 46.

Example 48 NaOgS N(CH2OCH3)I Forty-one parts of the product of Example 3 is added to 700 parts by volume of methanol and the mixture is cooled to below 5 C. Five parts by volume of concentrated hydrochloric acid is added, and the mixture is stirred for one hour below 5 C. after which sodium bicarbonate is added to discharge the acidity. The precipitated product is filtered oil, washed with methanol, and dried.

Example 49 The diaminotriazinyl intermediate isolated in the second paragraph of Example 3, 32 parts, is dissolved in 300 parts of dimethylformamide, and 42 parts of sodium bicarbonate is added. The mixture is cooled below 5 C. and treated with 40.2 parts of chloromethyl methyl ether, added dropwise over 45 minutes. The mixture is stirred with cooling for an additional 3 hours, warmed to room temperature, and filtered for removal of salt. The filtrate is then poured into 3000 parts acetone, with stirring, and the precipitated product is filtered off, washed with acetone, and dried.

The product is the same as that obtained in Example 48.

29 Example 50 /N N=NQNH-i TNHOHZOH CH3 N N 17% on Mouton):

Example 51 N K mmy-Gm NHf TNHOHZOH Ol- NHCHaOH p Aminophenyltrimethylammonium chloride is diazotized and the diazo coupled to l-naphthylamine in weakly acid medium. The product, which is 4-(4-aminonaphthylazo)phenyltrimethylarnmonium chloride, is treated by the procedure of Example 3, using an equivalent amount of this dye in place of the sulfonated azo dye of that example. The final methylolated dye is brownish orange with essentially the above structure.

If in place of p-aminophenyltrimethylammonium chloride diazo, one uses the diazo of p-aminobenzyltrimethylammonium chloride, one obtains a higher homolog of the above dye in which the trimethylammonium group is on an aliphatic carbon. This dye has a similar shade to the above.

We claim:

1. A process of modifying cellulose fibers which comprises wetting said fibers with an aqueous solution comprising at least 0.01% of a modifying agent and at least 0.'0002% of an acid catalyst, said modifying agent being a 1,3,5-triazine compound having at least one but not more than two substituents A, and at least one but not more than two substituents C; each substituent A being an organic dyestuff moiety having an ionogenic substit- 30 uent, said moiety being bonded through an amino group to a carbon atom of said triazine ring; and each substituent C being a member selected from the group consisting of methylolamino, dimethylolamino, alkoxymethylamino and dialkoxymethylamino; followed by drying said wet fibers and then heating said dried fibers above C.

2. The process of claim 1 in which the organic dyestuif is an azo dye.

3. The process of claim 1 in which the organic dyestutf is a vat dye.

4. The process of claim 1 in which the organic dyestuff is a phthalocyanine dye.

5. The process of claim 1 in which the catalyst comprises zinc nitrate.

6. The process of claim 1 in which the catalyst comprises an alkanolamine hydrochloride.

7. A fiber comprising cellulose modified by reaction with a reagent characterized by having a 1,3,5-triazine ring, said triazine ring having at least one but not more than two substituents A and at least one but not more than two substituents C on each triazine ring, there being no substituents on said triazine rings other than said A and C; each A substituent being an organic dyestuif moiety having an ionogenic substituent, said moiety being bonded through an amino group to a carbon atom of said triazine ring; and each C substituent being an amino group, at least one hydrogen of which is replaced by a mcthylol group; said reaction resulting in a bonding of said reagent to a carbon of the cellulose molecule through a CI-I O- linkage, there being in said modified fiber at least 0.01% by weight of said triazine reagent.

8. The modified fiber of claim 7 wherein the dyestufi is an azo dye.

:9. The modified fiber of claim 7 wherein the dyestulf is a vat dye.

10. The modified fiber of claim 7 wherein the dyestuff is a phthalocyanine dye.

References Cited in the tile of this patent UNITED STATES PATENTS 2,873,269 Fasciati et a1 Feb. 10, 1959 FOREIGN PATENTS 595,065 Great Britain Nov. 26, 1947 OTHER REFERENCES Broden et al.: Amer. Dyestuif Reporter, January 4, 1954, pages P6-P13.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,072,454 January 3, 1963 Robert S. Long et al,

It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 2, line 7, for "dyestuffs" read dyestuff column 9, line 27, for "2,761,688" read 2,761,868 column 12, line 26, before "which" insert in column 18, lines 23 to 29, for that portion of the formula reading:

NaO S- read NaO S- columns 19 and 20, lines 23 to 36, for that portion of the formula reading:

column 22, line 31, for "aminophenosulfonamide" read aminophenolsulfonamide column 25, lines 2 to 10, for that portion of the formula reading:

-N: N--H read -N=N NH column 26, line 27, for "(Pay-phthalocyanine)" read (Pcy:phthalocyanine) line 53, for 0.5" G," read 1 O-5 C. column 29, lines 5 to 8, for that portion of the 1 formula reading:

read

on CH3 Signed and sealed this 27th day of October 1964.

(SEAL) Attest:

ERNEST W. SWIDER I EDWARD J. BRENNER 

1. A PROCESS OF MODIFYING CELLULOSE FIBERS WHICH COMPRISES WETTING SAID FIBERS WITH AN AQUEOUS SOLUTION COMPRISING AT LEAST 0.01% OF A MODIFYING AGENT AND AT LEAST 0.0002% OF AN ACID CATALYST, SAID MODIFYING AGENT BEING A 1,3,5-TRIAZINE COMPOUND HAVING AT LEAST ONE BUT NOT MORE THAN TWO SUBSTITUENTS A, AND AT LEAST ONE BUT NOT MORE THAN TWO SUBSTITUENTS C; EACH SUBSTITUENT A BEING AN ORGANIC DYESTUFF MOIETY HAVING AN IONOGENIC SUBSTITUENT, SAID MOIETY BEING BONDED THROUGH AN AMINO GROUP TO A CARBON ATOM OF SAID TRIAZING RING; AND EACH SUBSTITUENT C BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF METHYLOLAMINO, DIMETHYLOLAMINO, ALKOXYMETHYLAMINO AND DIALKOXYMETHYLAMINO; FOLLOWED BY DRYING SAID WET FIBERS AND THEN HEATING SAID DRIED FIBERS ABOVE 120*C. 